$rankFusion and $scoreFusion Unbounded Memory Allocation During Error Suggestion Generation
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.
Summary
An authenticated user can cause the mongod process to be terminated by the operating system under memory pressure via the $rankFusion and $scoreFusion aggregation stages. The issue originates in the server's error-handling path and requires the ability to run aggregation queries.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA MongoDB Server (MongoDB) Fixed in 8.2.12, 8.3.7
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
MongoDB Server 8.2.12, 8.3.7
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-11112 libmongocrypt Improper Input Validation Leading to Process TerminationPriority LOW 24
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13075
- 2026-10-03 Alias added: GHSA-2xr2-6gf6-vqjx
References
More Mongodb vulnerabilities
- TI-2025-13542 Zlib compressed protocol header length confusion may allow memory read KEVCVSS 4.0HIGH 8.7
- TI-2013-01669 MongoDB before 2.0.9 and 2.2.x before 2.2.4 does not properly validate requests to the… CVSS 2.0MEDIUM 6.0
- TI-2026-56639 Uncontrolled Resource Consumption in MongoDB Sharded Cluster Router Allows Unauthenticated Denial of Service CVSS 4.0HIGH 8.7
- TI-2026-56628 Reachable assertion in MongoDB Server CVSS 4.0HIGH 8.7
- TI-2026-15322 Improper Input Validation in MongoDB Aggregation Framework Allows Unauthenticated Denial of Service on mongos CVSS 4.0HIGH 8.7
- TI-2026-08537 Unbounded recursion in BSONColumn interleaved-reference causes pre-auth stack overflow CVSS 4.0HIGH 8.7
Sources
- CVE-2026-13075 · CVE Program
- CVE-2026-13075 · NVD
- FIRST EPSS
- GHSA-2xr2-6gf6-vqjx · GitHub Advisory Database · CC BY 4.0
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